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A Cognitive Paradigm to Investigate Interference in Working Memory by Distractions and Interruptions

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Frequency Modulation Detection Thresholds are Unrelated to Individual Differences in Verbal Memory Capacity.

A K Bosen¹, B C Kohlmeier², S E Harris¹

¹Boys Town National Research Hospital, Omaha, Nebraska, USA.

Auditory Perception & Cognition

|September 2, 2025

Summary

This summary is machine-generated.

Frequency modulation (FM) detection performance in young adults with normal hearing does not appear to be influenced by memory capacity. This suggests that auditory sensitivity and memory are distinct cognitive functions in this population.

Keywords:

Frequency-Modulation Detection Temporal Processing Working Memory

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Area of Science:

Auditory Neuroscience
Cognitive Psychology
Psychoacoustics

Background:

Psychophysical measures of auditory sensitivity are commonly used to interpret speech recognition.
The assumption that these tasks are unaffected by cognitive factors like memory is being questioned.
Previous research indicates potential links between cognitive abilities and performance on psychoacoustic tasks.

Purpose of the Study:

To investigate the relationship between memory capacity and performance on frequency modulation (FM) detection tasks.
To determine if individual differences in memory capacity influence FM detection thresholds.
To examine if FM detection reflects memory capacity in young adults with normal hearing.

Main Methods:

Thirty-one young adults with normal hearing (ages 19-40) participated.
Participants completed two types of FM detection tasks (three alternative forced choice and Yes/No).
Memory capacity was assessed using auditory digit span and visual free recall tasks.

Main Results:

Performance on the two FM detection task designs yielded different psychometric functions.
Individual differences in FM detection performance were found to be reliable.
No significant correlations were observed between memory capacity measures and FM detection thresholds.

Conclusions:

In young adults with normal hearing, the encoding of temporal fine structure and memory capacity are separate cognitive constructs.
The findings suggest that previously reported associations between psychophysical and cognitive measures might be influenced by age or hearing decline.
Auditory sensitivity and memory capacity appear to be distinct in younger, healthy individuals.